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巴丹吉林沙漠腹地及东南部湖泊众多,除分布110个常年积水湖泊外,还存在若干季节性湖泊和干涸湖盆.通过对巴丹吉林沙漠湖泊群的实地考察、湖泊遗迹测量及14C和OSL定年,获得了全新世泛湖期存在的地貌学、沉积学和生物遗迹证据,揭示了巴丹吉林沙漠全新世早、中期湖盆面积扩大、区域气候相对湿润的特点.测年结果表明,巴丹吉林沙漠泛湖期开始于10cal ka BP,此前为泥炭发育期或湖沼期(11~10cal ka BP),大致在8.6~6.6cal ka BP,湖泊群达到全新世最大高湖面,并于晚全新世(约3.5cal ka至今)普遍出现退缩乃至干涸.根据植物钙质根管的形成时代及其所揭示的降水量阈值研究,巴丹吉林沙漠东南部在7.7~5.3cal ka BP期间古降水量可能达到200mm a~(-1).水量平衡计算表明,百年至千年尺度相对暖湿的区域气候条件,特别是南部和东南部深层地下水来水量增多,是巴丹吉林沙漠全新世湖泊群维持和史前文化发展的关键因素.
There are many lakes in the hinterland of Badain Jaran Desert and the southeastern part of the lake, in addition to the distribution of 110 perennial stagnant lakes, there are also a number of seasonal lakes and dry lakes.Based on the field investigation of the Badain Jaran Desert Lake Group, OSL dating and obtained the evidence of geomorphology, sedimentology and biological relics existing during the Holocene Panhu period, revealing the characteristics of the lake basin expanding in the early and mid-Holocene, relatively humid regional climate in the Badain Jaran Desert.The results of the dating show that, The Badanjilin Desert panhu period began at 10 cal ka BP, after a peat or lacustrine period (11 ~ 10 cal ka BP), roughly 8.6 ~ 6.6 ka ka BP. The lacustrine group reached the highest Holocene lake surface and was later Holocene (about 3.5cal ka to present) generally shrinks or even dries up.According to the age of plant calcareous root canal formation and its revealed threshold of precipitation, paleo-precipitation in the southeastern portion of Badain Jaran Desert during the period of 7.7-5.3 ka ka BP The amount of water balance may reach 200mm a -1. The calculation of water balance shows that the regional climatic conditions with a relatively warm and humid climate from the centenary to the millennium scale, especially the increase of groundwater in the south and southeast, Group to maintain and prehistoric cultural development of key factors.